Mattress overlay



FIG. 1 is a top plan view of a mattress overlay showing the top surface of our new design;

FIG. 2 is a right side elevational view of our design, with the left side elevational view being identical thereto;

FIG. 3 is a partial cross-sectional view of the front end taken along line 3--3 of FIG. 1, with the rear end identical thereto;

FIG. 4 is a cross-sectional view taken along line 4--4 of FIG.; and,

FIG. 5 is a bottom plan view of the mattress overlay. 

The ornamental design for a mattress overlay, as shown and described. 